Have you used a McCoy before?

They're decent engines, as long as you treat them with lots of respect. Lots of engines from that era did not do well after one lean run. The McCoys were very sensitive to that. They were not harder to set than other brands at all, just didn't stand a bad run as well. But propped right and with a good needle setting, they did good.

They were made to a price. Heck, they even marketed them for awhile in blister packs. Break in was as demanding as with all engines back then. You did not want to let a lean run happen during the breakin. It sounds pretty scary, but it wasn't really, it was just apt to be unforgiving. So you learned early and stuck with what you learned. We were more apt to verify our needle settings that people today. And more apt to have a filter on the delivery line. And more apt to check it frequently.

It will have enough power. Easily enough.